<template>
  <div :class="limit == 1 ? 'component-upload' : 'component-upload-image'">
    <el-upload multiple :action="uploadImgUrl" list-type="picture-card" :on-success="handleUploadSuccess"
      :before-upload="handleBeforeUpload" :limit="limit" ref="imageUpload" :before-remove="handleDelete"
      :show-file-list="true" :file-list="fileList" :headers="headers" :on-preview="handlePictureCardPreview"
      :class="{ hide: fileList.length >= limit }">
      <el-icon v-if="limit != 1" class="avatar-uploader-icon">
        <plus />
      </el-icon>
      <div v-if="limit == 1" style="display: flex; flex-direction: row">
        <el-icon class="avatar-uploader-box">
          <img class="avatar-uploader-url" src="@/assets/images/download.png">
          <div class="avatar-uploader-tip">上传图片</div>
        </el-icon>
        <div>
          <div style="font-size: 12px; color: #999">可上传{{ props.fileType }}等</div>
          <el-button type="primary">选择图片</el-button>
        </div>
      </div>

    </el-upload>
    <!-- 上传提示 -->
    <div class="el-upload__tip" v-if="showTip && limit != 1">
      请上传
      <template v-if="fileSize">
        大小不超过 <b style="color: #f56c6c">{{ fileSize }}KB</b>
      </template>
      <template v-if="fileType">
        格式为 <b style="color: #f56c6c">{{ fileType }}</b>
      </template>
      的图片
    </div>
    <el-dialog v-model="dialogVisible" title="预览" width="800px" append-to-body>
      <img :src="dialogImageUrl" style="display: block; max-width: 100%; margin: 0 auto" />
    </el-dialog>
  </div>
</template>

<script setup>
import { getToken } from "@/utils/token";
const headers = ref({ Authorization: "Bearer " + getToken() })
const props = defineProps({
  modelValue: [String, Object, Array],
  // 图片数量限制
  limit: {
    type: Number,
    default: 5,
  },
  // 大小限制(MB)
  fileSize: {
    type: Number,
    default: 5,
  },
  // 文件类型, 例如'.png,.jpg,.jpeg,.gif,.bmp'
  fileType: {
    type: String,
    default: '.png,.jpg,.jpeg,.gif,.bmp',
  },
  // 是否显示提示
  isShowTip: {
    type: Boolean,
    default: true
  },
});

const { proxy } = getCurrentInstance();
const emit = defineEmits();
const number = ref(0);
const uploadList = ref([]);
const dialogImageUrl = ref("");
const dialogVisible = ref(false);
import useUserStore from '@/store/modules/user'
const userStore = useUserStore();


const uploadImgUrl = import.meta.env.VITE_APP_API_BASEURL + '/admin/oss/endpoint/upload'; // 上传的图片服务器地址
const fileList = ref([]);
const showTip = computed(
  () => props.isShowTip && (props.fileType || props.fileSize)
);

watch(() => props.modelValue, val => {
  if (val) {
    // 首先将值转为数组
    const list = Array.isArray(val) ? val : props.modelValue.split(",");
    // 然后将数组转为对象数组
    fileList.value = list.map(item => {
      if (typeof item === "string") {
        item = { name: item, url: userStore.ossUrl(item) };
      }
      return item;
    });
    console.log("fileList.value", fileList.value)
  } else {
    fileList.value = [];
    return [];
  }
}, { deep: true, immediate: true });

// 上传前loading加载
function handleBeforeUpload(file) {
  let isImg = false;
  if (props.fileType.length) {
    let fileExtension = "";
    if (file.name.lastIndexOf(".") > -1) {
      fileExtension = file.name.slice(file.name.lastIndexOf("."));
    }
    isImg = props.fileType.split(",").some(type => {
      if (file.type.indexOf(type) > -1) return true;
      if (fileExtension && fileExtension.indexOf(type) > -1) return true;
      return false;
    });
  } else {
    isImg = file.type.indexOf("image") > -1;
  }
  if (!isImg) {
    proxy.$modal.error(
      `文件格式不正确, 请上传${props.fileType}图片格式文件!`
    );
    return false;
  }
  if (props.fileSize) {
    const isLt = file.size / 1024 / 1024 < props.fileSize;
    if (!isLt) {
      proxy.$modal.error(`上传头像图片大小不能超过 ${props.fileSize} MB!`);
      return false;
    }
  }
  proxy.$modal.loading("正在上传图片，请稍候...");
  number.value++;
}

// 文件个数超出
function handleExceed() {
  proxy.$modal.error(`上传文件数量不能超过 ${props.limit} 个!`);
}

// 上传成功回调
function handleUploadSuccess(res, file) {
  if (res.code === 200) {
    uploadList.value.push({ name: res.data.name, url: userStore.ossUrl(res.data.name) });
    uploadedSuccessfully();
  } else {
    number.value--;
    proxy.$modal.closeLoading();
    proxy.$modal.error(res.msg);
    proxy.$refs.imageUpload.handleRemove(file);
    uploadedSuccessfully();
  }
}

// 删除图片
function handleDelete(file) {
  const findex = fileList.value.map(f => f.name).indexOf(file.name);
  if (findex > -1 && uploadList.value.length === number.value) {
    fileList.value.splice(findex, 1);
    proxy.$emit('modelValue', listToString(fileList.value))
    return false;
  }
}

// 上传结束处理
function uploadedSuccessfully() {
  if (number.value > 0 && uploadList.value.length === number.value) {
    fileList.value = fileList.value.filter(f => f.url !== undefined).concat(uploadList.value);
    uploadList.value = [];
    number.value = 0;
    proxy.$emit('modelValue', listToString(fileList.value))
    proxy.$modal.closeLoading();
  }
}

// 上传失败
function handleUploadError() {
  proxy.$modal.error("上传图片失败");
  proxy.$modal.closeLoading();
}

// 预览
function handlePictureCardPreview(file) {
  dialogImageUrl.value = file.url;
  dialogVisible.value = true;
}

// 对象转成指定字符串分隔
function listToString(list, separator) {
  console.log("list", list)
  let strs = "";
  separator = separator || ",";
  for (let i in list) {
    if (undefined !== list[i].url && list[i].url.indexOf("blob:") !== 0) {
      strs += list[i].name + separator;
    }
  }
  return strs != "" ? strs.substr(0, strs.length - 1) : "";
}
</script>
<style lang="scss" scoped>
.component-upload {
  display: flex;
  flex-direction: row;
}

::v-deep(.el-upload--picture-card) {
  background: #fff;
  border: none;
  width: auto;
  height: 80px;
}

::v-deep(.el-upload-list--picture-card .el-upload-list__item) {
  width: 80px;
  height: 80px;
}

::v-deep(.el-upload-list__item-actions) {
  width: 80px;
}

::v-deep(.picture-card) {
  width: 80px;
}

.picture-card {
  border: 1px solid red;
}

::v-deep(.avatar-uploader-icon) {
  width: 80px;
  height: 80px;
  border: 1px dashed #0B77FF;
}

.avatar-uploader-icon {
  width: 80px;
  height: 80px;
  border: 1px dashed #0B77FF;
}

.avatar-uploader-box {
  display: flex;
  flex-direction: column;
  width: 80px;
  height: 80px;
  border: 1px dashed #0B77FF;
  margin-right: 10px;

  .avatar-uploader-url {
    width: 32px;
    height: 32px;
  }

  .avatar-uploader-tip {
    font-size: 13px;
    color: #9999;
  }
}
</style>
